'I do not understand why people should brush teeth, as it is not like others will look into your mouth,' said Ji Hyun Ji (above), 20. 'As food scraps pile on, they will actually protect my teeth.' -- PHOTO: KOREA HERALD/ANN EVERYONE has a special habit. However, sometimes they get so carried away as to shock others. Martian Virus, a popular TV programme from tvN based in Seoul, introduces those with habits or characteristics that are grotesque, but those they are proud of nonetheless. The show is to introduce a girl whose habit does match her beautiful outward appearance. Known as 'Cutey Yellowish,' she stopped brushing her teeth a decade ago. The last time she remembers doing so was when her mother brushed teeth for her. 'I do not understand why people should brush teeth, as it is not like others will look into your mouth,' said Ji Hyun Ji, 20. 'As food scraps pile on, th...